摘要:
A problem of the present invention is to provide a curable composition which gives good curability by use of a catalyst other than organic tin catalysts. The above problem is solved by a curable composition, comprising: (A) one or more polymers having a silicon-containing group which is crosslinkable by forming siloxane bonds, (B) an amine compound, and (C) a silicon compound having, as substituents on its silicon, at least one electron withdrawing group, and at least one group selected from the group consisting of alkoxy groups, alkenyloxy groups, acyloxy groups, and a hydroxyl group.
摘要:
The present invention has its object to provide a curable composition insuring a reduced stress without sacrificing restoring force and other physical properties and having a sufficient degree of adhesiveness. The present invention is related to a curable composition comprising comprising an oxyalkylene polymer having at least one reactive silicon group per molecule (A-1), an acid (B), an amine (C), and a tin-series curing catalyst (D). This composition optionally contains a vinyl polymer having at least one reactive silicon group.
摘要:
The invention provides a method of producing a reactive silicon group-containing polyether oligomer which comprises reacting (a) a polyether oligomer having main chain of a polyether and, in each molecule, at least one unsaturated group represented by the general formula (1): H2C═C(R1)—R2—O— (1) (in the formula, R1 is a hydrocarbon group containing not more than 10 carbon atoms and R2 is a divalent organic group containing 1 to 20 carbon atoms and one or more species selected from the group consisting of hydrogen, oxygen and nitrogen atoms as a constituent atom) or the general formula (2): HC(R1)═CH—R2—O— (2) on a side chain or at a terminus with (b) a reactive silicon group-containing compound in the presence of (c) a group VIII transition metal catalyst to introduce the reactive silicon group into said polyether oligomer (a), wherein the reaction is carried out in the presence of (d) a sulfur compound.
摘要:
The present invention provides a process for the preparation of a reactive silicon group-containing polymer. A novel process for the preparation of the polymer includes allowing an alkylene oxide to undergo ring opening polymerization with an organopolysiloxane compound having an active hydrogen-containing functional group with which the alkylene oxide is reactive as an initiator in the presence of a catalyst to synthesize a polymer of organopolysiloxane and polyoxyalkylene, and then introducing a reactive silicon group into the polymer. Another process for the preparation of the polymer as defined above is provided, which includes allowing an alkylene oxide to undergo ring opening polymerization with an organopolysiloxane compound having an epoxy group in the presence of a catalyst with an active hydrogen-containing compound as an initiator to synthesize a polymer the main chain of which is essentially a copolymer of organopolysiloxane and polyoxyalkylene, and then introducing a reactive silicon group into the polymer.
摘要:
A curable resin composition is disclosed which is composed of (a) an oxyalkylene polymer containing at least one reactive silicon group per molecule and having a number average molecular weight of not less than 3000 and an Mw/Mn ratio of not higher than 1.6, (b) a copolymer having a molecular chain which comprises (A) an alkyl acrylate monomer unit and/or an alkyl methacrylate monomer unit each having 1 to 8 carbon atoms in the alkyl moiety thereof and (B) an alkyl acrylate monomer unit and/or an alkyl methacrylate monomer unit each having 10 or more carbon atoms wherein the total number of monomer units (A) and monomer units (B) constitutes more than 50% of the monomer units in the copolymer (b), and (c) a curing catalyst.
摘要:
An aromatic polyestersulfone having improved heat resistance, film-forming property, hydrolysis resistance and mechanical strength which comprises 1 to 100% by mole of recurring units of the general formula: ##STR1## and 99 to 0% by mole of recurring units of the general formula: ##STR2## wherein R and R' are the same or different and each is an alkyl or alkoxyl group having 1 to 4 carbon atoms, Ar is a bivalent aromatic group, and x and y are 0 or an integer of 1 to 4 provided that the sum of x and y is from 1 to 8.
摘要:
The present invention has its object to provide a pressure sensitive adhesive composition which can be applied using no organic solvent and which manifests excellent pressure sensitive adhesion characteristics. This object can be achieved by a pressure sensitive adhesive composition which comprises, as essential constituents, the following: (A) a hydrolyzable silyl group-containing organic polymer containing at least 1.3 hydrolyzable silyl groups per molecule and having a number average molecular weight of 15,000 to 100,000; (B) a hydrolyzable silyl group-containing organic polymer containing 0.3 to 1.3 hydrolyzable silyl groups per molecule and having a number average molecular weight of 500 to 15,000; and (C) a tackifier resin.
摘要:
The present invention has its object to provide a curable composition which allows slight bleedout of a liquid compound to occur to the cured product and shows good curability and adhesiveness using a non-organotin catalyst, an amine compound, as a silanol condensation catalyst.The present invention relates to a non-organotin-based curable composition which comprises: (A) an organic polymer having a silicon-containing group capable of crosslinking by siloxane bond formation, and (B) a specific amidine compound and/or a guanidine compound having a melting point of not lower than 23° C., as a silanol condensation catalyst.
摘要:
A problem of the present invention is to provide a curable composition which gives good curability by use of a catalyst other than organic tin catalysts. The above problem is solved by a curable composition, comprising: (A) one or more polymers having a silicon-containing group which is crosslinkable by forming siloxane bonds, (B) an amine compound, and (C) a silicon compound having, as substituents on its silicon, at least one electron withdrawing group, and at least one group selected from the group consisting of alkoxy groups, alkenyloxy groups, acyloxy groups, and a hydroxyl group.
摘要:
The present invention has its object to provide a pressure sensitive adhesive composition which can be applied using no organic solvent and which manifests excellent pressure sensitive adhesion characteristics. This object can be achieved by a pressure sensitive adhesive composition which comprises, as essential constituents, the following: (A) a hydrolyzable silyl group-containing organic polymer containing at least 1.3 hydrolyzable silyl groups per molecule and having a number average molecular weight of 15,000 to 100,000; (B) a hydrolyzable silyl group-containing organic polymer containing 0.3 to 1.3 hydrolyzable silyl groups per molecule and having a number average molecular weight of 500 to 15,000; and (C) a tackifier resin.